I recorded a video
GS 1630:
Account 1: pjsip 199. BLF 1 – 199, BLF2 – 186
Account 2: sip 200. BLF 4- 199, BLF5 – 186
WP820:
Account 1: pjsip 186
After add new pjsip ext(save settings), blf on pjsip account freeze
on sip account work
The call also ended on one side too