Lightroom Classic: Import problem with Mojave update (merging)

I have a similar issue since upgrading to Mojave. When I click on theImport button the dialog opens in the middle area but the Library panels remainopen on each side and cannot be closed, so it is impossible to Import. I havetried selecting other Modules (Dev, Print etc) and sometimes this clears theLibrary side panels but not always. I have tried different screen modes and seen problem regardless of which selected. Restarted LR but still same issue yesterday. However tried again just now (still logged in from yesterday) and working normally.

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