Created attachment 171377 [details] Visual example of the bug and example sequence shortcuts. 1: hovering selection. 2: pressing alt. 3: pressing first sequence hotkey. 4: pressing alt. SUMMARY When the first key in the sequence is pressed and the follow up is not it blocks the use of modifiers for tools, e.g. alt and shift key for selection tool do not activate. STEPS TO REPRODUCE 1. Assign shortcut sequence hotkeys. 2. Press the first key in the sequence. 3. Choose selection too. 4. Hold down add. OBSERVED RESULT The selection tool remains normal EXPECTED RESULT Selection tool goes into add mode. SOFTWARE/OS VERSIONS Version: 5.3.0-prealpha (git 55a937c) Windows: 10 ADDITIONAL INFORMATION Shortcuts sequences are key combinations (e.g. Shift + S shortcut then the B key). The first tap of tab key cancels it, the second uses its assigned shortcut.