I had installed Borland Delphi 5 into a bottle in the previous version of Crossover on MacOS El Capitan, and Delphi 5 all seemed to be working okay then.
I have recently upgraded to version 17 of Crossover (version 17.0.031291), and upgraded MacOS to macOS Sierra version 10.12.6.
Into a bottle in this Crossover 17, I have installed Delphi 5, which installed without any complains and starts and executes simple projects ok. The Delphi 5 IDE consists of several non-modal windows displayed at once (eg. editor, toolbar, object inspector, etc). (It looks a bit like a windows MDI interface but isn't).
However, in the Delphi 5 IDE in this Crossover 17 on macOS Sierra, the active window is often partly or fully hidden hidden behind other Delphi windows. For example, when I click on one Delphi IDE window (eg. the editor window), that window becomes active, but often doesn't come to front as expected.
Also, when a modal dialogue should appear (eg. when select 'Exit' from Delphi menu, then a 'Save changes' modal dialogue would appear), this modal dialogue is often fully hidden behind the other Delphi windows, and as it's a modal dialogue then the other windows cannot be moved out of the way. The active window (eg. the modal dialog) still receives keyboard focus (so I can press "Esc" to cancel, or right/left cursor keys to select option in the hidden dialogue). Other modal dialogues (eg. 'Environment Preferences') also don't come to the front as expected.
If I move all other Delphi IDE windows to the side before selecting 'Exit' from the menu, then the modal 'Save changes' dialogue is visible as no windows are obscuring it. Similarly for other modal dialogues (eg. 'Environment preferences').
Sometimes, if I click on a Delphi5 window that is already at the front, then instead of that window staying at the front, that selected (now active) window sometimes gets sent to the back (ie. partly hidden by the other windows).
The Crossover 'Window' menu only shows the one window 'Delphi5', so I can use that menu option to bring any hidden the dialogue menu to the front.