Moes UFO-r11 IR blaster: codes too long?

Hi! So I recently got a Moes UFO-r11 IR blaster to try to control my old Mitsubishi mini-split. The blaster seems to work fine, I can learn end send codes from Z2M and the mini-split responds.

But when I try to make an automation or send codes from home assistant it fails, with a message that the code is too long, over 255 characters. Seems the text service cannot handle the length of the IR codes? Anyone seen this before, or have any other solutions I can try?