The xem is is in t5577 mode but in theory it should switch to hid mode when you copy to it. You weren’t specific in your reply but are you getting a confirmed read when you scan the hid fob with the cloner?
To be fair, the blue cloners dont have a great reputation and it is possible you have a faulty cloner. Im not saying it’s likely, just a possibility. The white cloners are mant to be much better.
I just checked with a t5577 card. Chameleon ultra can only read em4100 cards at the moment.
I dont have that much experience with low frequency so im not best placed to troubleshoot this much further. Hopefully one of our more knowledgeable community members will be able to help you progress this.
This is also a useful post and theres some talk about modifying the antenna to outside the case to prevent tearing.