Weird MIDI import/export issue

[LukeHoward]

I'm on Pro Tools Ultimate 2018.4.0 on HDX.

I'm attempting to export a 48k session into a new 96k session, either using Save Copy In (from source session) or Import Session Data (from the target session). Instrument track clips are showing absent any MIDI data unless I uncheck the "Apply SRC" option (which, of course, should be irrelevant).

(To be clear: the clips are there and in the right places on the timeline, but there is no MIDI data in them. I haven't tried with pure MIDI tracks.)

Am I the only person to have experienced this?

I've worked around it by importing the audio tracks (with SRC) and instrument tracks (without "SRC") separately, but this seems a very unusual bug.

[LukeHoward]

Actually, it's worse than that: when importing instrument tracks without "SRC", they're showing up at the wrong spot on the timeline – I suppose this makes sense if absolute sample values are retained (all instrument tracks are sample- rather than tick-relative; obviously, that's the next thing to try).

EDIT: OK, it works if the source session's Instrument tracks are tick- rather than sample-relative. So that's a workaround.