In my post with the screen shot and the one earlier with the note about the purge wiper calibration, this is the purge wiper. I identified my clumping was happening here. When the nozzle was flushing at the start of a print or purging between colour swaps, it would clump and drag it along or knock it back onto the print surface.
My purge wiper, when you push the activation arm, it was not extending full and was part sitting under the tool head.
I went through the bambu wiki for realigning the tool head to the purge wiper.
Then BBL support sent me the screenshot I’ve posted earlier. From this I adjusted the position of the wiper to sit further forward when the lever was engaged. It now sits flush with the plastic housing just below it.
This solved my clumping issue. I don’t know if it will yours. You need to determine at what point it clumps. Is it when it flushes/purges or is it just randomly during a print?
No update has caused any issue with my clumping, it was all mechanical. My printer is working fine now albeit I need to adjust some tension on my Y axis after lubricating it to remove some squeaking.