Samsung J6 2018 - hotspot stops during a phone call

Double sim card Samsung J6 (2018) - card Nr 1 for mobile data; card Nr 2 - calls and texts. When hotspot is on to provide mobile data (from Sim card 1) to my other devices it all works good. Until I make a phone call (from Sim card 2). During a phone call mobile data suddenly is not available. Please advise if you are familiar with such situation and can it be fixed. Thank you!

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