Same here only FSDT Addon, all others i own no problem at all.
Indeed it is a DEV issue the question who is responsible for it - concerning the forum answers at FSDT support forum it is a known issue and Asobo is aware of it and it will be fixed with SU6 which isn’t. I reported several times during beta phase that there is still missing Jetways (in my case LSZH) with FSDT addon airport.
For now i deinstalled the LSZH Addon because i also faced sometimes CTD (even also after SU6) when LSZH addon is installed
At the moment it was just wasting money so far - as my refund request was rejected (mention it earlier)