categories of tasks in ics calendar lost after phone sync

Anmeldedatum: 16.01.2017 Beiträge: 1 Wohnort: Poland

I did not find it in the latest posts, so I post new one

Categories of tasks are deleted from my calendar on PC (ics format) after sychronization; however, if changes of the tasks are on PC side only, categories are properly synchronized (they are being written in MPE tasks database in my phone); if any change at any task is done on Phone side, all the categories of all the tasks in the Calendar are deleted

I am using:
PC Win 7 64 on Dell Latitude E6430;
Thunderbird version 45.6 for Calendar on my PC
Android KitKat 4.4 on phone Huawei Honor 4X
WiFi Connection
MPE version 1.8.8 on PC and MPE Client 1.0.42 on my phone

Any solution?

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