[Android][Gboard] Track changes at the beginning of the block does not work

[pjasiun]

1. Open track changes sample on android (turn on track changes mode).
2. Put the selection at the beginning of the block
3. Type "abc".

ckeditorerror.js:70 Uncaught CKEditorError: view-renderer-filler-was-lost: The inline filler node was lost. Read more: https://ckeditor.com/docs/ckeditor5/latest/framework/guides/support/error-codes.html#error-view-renderer-filler-was-lost

    at Renderer._removeInlineFiller (webpack:///./packages/@ckeditor/ckeditor5-engine/src/view/renderer.js?:412:10)
    at Renderer.render (webpack:///./packages/@ckeditor/ckeditor5-engine/src/view/renderer.js?:205:9)
    at View._render (webpack:///./packages/@ckeditor/ckeditor5-engine/src/view/view.js?:704:18)
    at View.eval (webpack:///./packages/@ckeditor/ckeditor5-engine/src/view/view.js?:211:9)
    at View.fire (webpack:///./packages/@ckeditor/ckeditor5-utils/src/emittermixin.js?:218:30)
    at View.change (webpack:///./packages/@ckeditor/ckeditor5-engine/src/view/view.js?:503:10)
    at View.forceRender (webpack:///./packages/@ckeditor/ckeditor5-engine/src/view/view.js?:524:8)
    at MutationObserver._onMutations (webpack:///./packages/@ckeditor/ckeditor5-engine/src/view/observer/mutationobserver.js?:257:13)

It is regression, work fine on the build from iteration 26, does not work on the build from iteration 27.

Does not work on Gboard, works fine in SwiftKey Keyboard.

[pjasiun]

This is because of ckeditor/ckeditor5-engine@c698683.