Berlin10.1 and TAdveditbtn

hi


just opened old project made with seattle in a form i've TAdvEditBtn. if i resize or move form in the ide i've access violation 
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Error
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Access violation at address 184AAE04 in module 'TMSDXE10.bpl'. Read of address 00000069.
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OK   Details >>   
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I have retested this here with Berlin and I cannot see any issue. Is this happening when you please a new TAdvEditBtn on the form? If not, what specific about the AdvEditBtn where this happens?

i think is a new floating form system of berlin. I downgraded to seattle. Is not stable !

I have retested this here in Berlin with the floating form design, but I cannot see an issue with TAdvEditBtn