Please consider implementing a persistent MIDI clock in the MC6.
Upon testing with an MC6 and a Selah Quartz v1, apparently Timeline multiplies incoming BPM with the tap sub-division. Once MC6 gets out from the tempo preset, this multiplied BPM is carried through wherever you go on the Timeline,
For example: Inputting 124BPM from MC6 to a dotted eighth preset on the Timeline will display 166BPM instead (1.333 * 124BPM - rounded up). If you subsequently go to quarter note preset for example, the preset will then clock at 166BPM instead of the intended 124BPM.