Shelly RGBW restarting in loop on 100% brightness

[Revinor]

I have connected 5m 24V LED RGB strip. It works perfectly, until I try to put brightness to 100% - shelly then starts restarting over and over. 

I thought it is amperage, but when I'm running it at 96% brightness, Shelly reports 69.2W, 24.5V, 2.824A. Given it is total amperage, not per-channel, it should be well inside a safe range (less than 1A per channel). It is also not overheating (checked by finger). Threshold seems to be 97% - when I try to do that, device resets (and then I must stuggle to get it back, as it tries to recover to previously set brightness on startup, only to fail again).

If I set color to something else than pure white, everything works even on 100% brightness.

Does it sound familiar? Alternatively, is there a way to limit max brightness, so long press won't reach it when increasing brightness?

 

[Revinor]

Problem solved. Shelly is all right, my power adapter was rated for only 2A (which I haven't noticed) and had a hard cutoff around amperage in question (and got uncomfortably warm). Switching it to 4A one solves the issue.

[Heinz]

can you post the adapter you currently using ?

[Revinor]

Please note that this is testing phase only - for checking how things work. In real installation my eletrician will use some proper transformer for embedded use cases.

https://www.senetic.co.uk/product/EX.14046