I couldn't find anywhere in the stable iOS app to report bugs/crashes, so am posting it here.
Version: 1.6.0 (Stable, not Testflight beta)
Description: Opera Touch crashes consistently on iOS 12.2 whenever 'Share' >> 'Open in Touch' is selected for any URL in other apps. I think Opera Touch crashes somewhere in the process of something, because a 'ghost window' flashes very quickly after 'Open in Touch' is tapped, but then this disappears and I remain in the originating app.
I have captured a screenshot of this Opera Touch 'ghost screen':