SUMMARY
During sending files from Android to PC is showing progress windows where is present link "Download". Clicking into this link opens directory in Dolphin. The problem is that it opens directory in Dolphin present in different activity than current one.

STEPS TO REPRODUCE
1. Create couple activities (I have 3: A, B)
2. Open Dolphin on activity A and activity B
3. Back to activity A and minimize Dolphin
4. pair kdeconnect with your Android phone
5. in Android try so send couple files to your PC
6. in progress window click into "Download"

OBSERVED RESULT
plasma switches to activity B and opens directory in Dolphin

EXPECTED RESULT
plasma should not switch to different activity looking for Dolphin instance whereas Dolphin is working in current one and here should open directory for example in another card

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: YES
(available in About System)
KDE Plasma Version: 5.22.5
KDE Frameworks Version: 5.85
Qt Version: 5.15.2

ADDITIONAL INFORMATION
my phone system:  Android 8.0
kdeconnect 21.08.1