I don’t think is normal I have been printing with 1 role of white Bambu Lab PLA Basic and I have 3 extruder cloggeds in a row. First two with my old extruder, aftje the second clogged I place a brand new extruder and hotend and I get my thirst extruder clogged this is pretty strange I think every thing is original Bambu Lab and I don’t think it are the brand new parts even the rol was brand new it is almost to it end bud this does not seem right.
Little update pictures of my old extrude open so you can see how it is clogged. On picture three you see the part the goed side of the part was at the hotend side. And this always happens at the first layer but when my printer starts printing I go and do other things and because AI don’t detect this the printer goes on to the end so pretty strange that he goes on printing without movement of filament true extruder, ams and ams hub the al don’t detect this. I replace extruder gear with new ones in this old extruder see how long this take to get clogged again.
Heat creep? The exhaust fan cant actually keep up, so you have to open the door and remove the lid. Just a guess though. My extruder got really hot when I first got my bambu. I cut the perforated sections off of yhe hotend cover so the hotend fan could get cooler air. As it came, it pulled up hot air from the bed and nozzle
That would be strange but everything can happen bud why not Al the time in let me print for about 2-3 days almost 10-15 hours a dag en then it happen clean is and the it work again never had this problem in the past months.
As we can see we are 26 days furder and again a extruder clogged, and again with a white role basic PLA from Bambu Labs, pretty strange it always happen with this white role of Bambi lab PLA, I have a black one also in it use them as them both the the same amount of times. Print lot of white en black parts but again always the white one gets clogged.
The information is correct according to the BBL filament guide. NO enclosure.
My extruder has also clogged up several times in a row lately… probably the cause is the excessive temperature of these days (we are over 30°C). I solved it by turning on the air conditioning in the room where I have the printer
Don’t know the current status but there was a batch or more of white Bambu PLA that went through, got shipped to customers, and caused all sorts of trouble. Bambu never publicly addressed it so don’t know the extent or if any is still in the supply chain. I don’t know for certain but this may also be the same origin for the spools where the filament end was taped to the spool hub and could pull the tape into the filament handling system.
At any rate, there was problematic white Bambu PLA that many probably have in inventory now. It was really shiny, brittle, and would also break in the AMS and extruder. May or may not be the issue but you seem to have already narrowed it down to the white PLA.
I also think it is a bad batch but off course Bambu would not reacts to that. And that is it only happening with to white rolls that I buy at the same time
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I have experienced this problem a lot and especially because of power outages. After every power outage, the filament extruder gets clogged just like in the image. It is generally interesting in normal printing but if I use PLA after printing PETG, it gets clogged.
I have this sometimes after I print abs but een lot of time just white pla afther each other, I print for years had many type of printers some were people say why you buy that one and l printed en never never got a clogged extruder or hotend till I got aan Bambu labs X1C and I think he is 10x more expensive then the one I had before. But that one could not print many colours at once so I think that I have to take for what it is. I need een second printer but I think it will not be a Bambu Labs any more all brands come with multicolour so choice enough
I’m not that hopeless yet 
I have an X1C. At first I had a cutter problem. Then I had a first layer problem. I think I disassembled the extruder 4 times in 1 month but the rest of it is still good. I use it with the lids open for PLA. Because it’s 40 C degrees here. Maybe it takes some time to get to know it. I still believe it’s good. Because the print quality is really good. I love it