Hello @Alessandro Bonacchi ,
There may be compatibility issue between Remote Desktop Client for IOS and IBM iSeries Access for Windows. What's then version of your RDP client and is it up-to-date? This may work fine on the latest version of the RDP app for Android. This appears to be an issue with the app on iOS.
Microsoft Remote Desktop Client for Android has“Use scan code input when available” in the settings which addresses this problem in some case. Please add this feature to iOS as well.
References:
https://remotedesktop.uservoice.com/forums/272085-remote-desktop-client-for-android/suggestions/8028936-add-typing-in-scan-code-mode
https://remotedesktop.uservoice.com/forums/265183-remote-desktop-for-ios/suggestions/8780344-fix-keyboard-issue-when-using-virtualbox-pidgin
https://social.technet.microsoft.com/Forums/en-US/b5c3a1ce-fd21-4813-9a93-e02c5133093e/ios-rdp-keyboard-to-vm-guest?forum=winRDc
Best regards,
Leila
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