Please re-read my previous answer, it's possible some airports not matching the standard naming convention might have not be detected for automatic Disabling, so they are still Enabled, so you need to add them to the Disabled list manually by ICAO.
Basically, if an airport is on the Enabled list, it will have the jetways replaced, and if it's on the Disabled list, it won't. All 3rd party airports installed should always be on the Disabled list, unless a ( very rare ) case in which the 3rd party airport parking names/positions matched the default airport precisely.