DOM rendering sometimes freezes when playing with max speed

[oscarlorentzon]

mapillary-js version: 2.10.0

Steps to Reproduce Behavior

1. Increase play speed to max
2. Play sequences (happens more often on panorama sequences) successively, navigate to a new sequence immediately after the current one reaches the last sequence node and start playing the new sequence.

Expected Behavior

DOM elements are responsive and represent the current state of the viewer.

Actual Behavior

Intermittently the DOM elements freezes and do not update when navigating to other nodes with e.g. keyboard commands. Once frozen the domRenderer.render$ subscription does not receive the emitted items. The viewer can not recover from this state.

[oscarlorentzon]

Update: the DOM rendering freezes sometimes if setting a high speed and starting to play from a position within the last ~40 nodes of a sequence with more than ~260 nodes. Underlying cause is the pre-caching in the play service not handling max index in the sequence keys array properly.