It is fairly well known, or it should be, that grid infill can cause problems, with the nozzle colliding with previous lines, which have had time to set. It may be OK for small areas of infill, but larger areas, the filament will have stiffened, and the nozzle does not raise between direction changes of the line. However, there are other types of infill with lines that cross without raising the head that could cause the same type of problem
Cubic, grid, triangular, tri-hexagon, adaptive cubic and support cubic, for example. I’ve no idea why there needs to be all these faulty infill patterns.
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You’ll want to remember that Studio is derived from Prusa Slicer. A lot of what you see is just recompiled from the Prusa source code. Seeing how Bambu operates, do we really believe they actually tested these features? So it stands to reason that what we are seeing is a lot of ‘vestigial code’ that Bambu has kept in the slicer for the purpose of making their slicer appear more robust when perhaps a large number of those functions may not apply to the Bambu Printers.
Let’s be candid. Bambu is in the middle of a land grab. Their strategy with the printers they’ve released, and most of all Makerworld, share a common theme: they focus on one aspect of the market and try to exploit the interest in that aspect. In the case of the X1 and P1 series, it was competing on speed, cost, and ease of use. But at no time can we honestly say they were ‘the best.’ One could even say that they were only successful because their competition let them, or maybe they’re just a ‘The sharpest tool in a shed of dull tools’. Take Makerworld as an example. What was their first move? Copy content from Printables and Thingiverse to bolster their numbers with ripped off contents. That was until they got caught and were blocked. But you can’t say that the content number on Makerworld was earned through honest means.
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I agree with your summary. My post was to mention to others, that it isn’t just grid mode. I would have thought that the wonderful Prusa empire would have known the problem, but then, it doesn’t surprise me, since in my opinion, they’ve taken more from opensource than they’ve given back.
I think it’s OK to have infill patterns that might cause a problem. They may have other redeeming characteristics, and I like to have options.
What baffles me is that Grid infill is the default. Bambu is trying to make printing easy, so why start every print with a pattern that can bend a nozzle or knock the print off the plate?
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When Bambu changes it to not be the default, I can’t wait to hear all the people that come out of the woodwork to complain about it not being the default… 
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True words my friend . true words!
Indeed I think their best option is to release a feature that allows the user to select and save , by user choice, persistant infill and other settings like that for a user choice SLICER profile, that persists or at leasts updates relevent ones through Studio updates (different and independant of Printer and Filament profiles as we have that already). An intial default \ Bambu choice Profile would also remain baked in as a System Slicer profile, much like the System Pritner and Filament profiles.
Obvviously, with the caveat that any support issues must also intially be tested WITHOUT the user choice changed SLICER Profile, as Bambu cannot be expected to support all the various often misguided user specfied options.
This would also common user preferences globally, such as infills, walls, without the need for MULTIPLE profiles against hte system pritn settigns eg I have at least 15-20 ‘user presets’ setup like per nozzle size and and print size from their System presets
eg
0.20 Standard , but with Gyroid
0.20 Standard, but with Gyroid and 4 walls
0.20 Standard, but with Gyroid and 4 walls and ironing top all.
0.16 Optimal, but with Gyroid
0.16 Optimal, but with Gyroid and 4 walls
0.16 Optimal, but with Gyroid and 4 walls and ironing top all.
and on and on…
- Even just 1 global profile such as Default infill choice alone, would delete 6 of my ‘Print Profiles’
- A profile with Default Infill AND WALLS- WOWeeee!!
- A profile that lets me set 3??? Infill, Walls, Ironing for example - omg. heaven!
I think that about four distinct infill paterns would be enough. What you don’t know about you don’t miss. It’s a bit like promoting a car by the shape of its cup holders. Choices make life too complicated.
I usually avoid those infills, but one benefit is they are stronger than the non-crossing infills because more plastic is extruded at the joints. Also, cubic is a nice one to use for some sound and temperature insulating effect. The most important thing is to never use them with PETG, that is usually a recipe for disaster.
fully agree with the response