TinyMCE messes up text when its "caption" contains only a space

[szotsaki]

1.) Have a long text
2.) Insert an image inside there with no link pointing anywhere and a caption that contains only a space
3.) Make some <dl>-s, numbered lists etc after that
4.) Insert a new image with full size also, and a caption with only a space.

After this everything is messed up. The whole text before the second image becomes the caption of the first image and the second image disappears.

[DrewAPicture]

Reproduced this in 3.2.1 and latest trunk, haven't tried earlier versions.

[hew]

Related: #19389

[SergeyBiryukov]

Related: #21848

[azaozz]

Seems fixed in 3.5 (with the new media modal). Empty captions (containing only white space) are not inserted any more, only the image is inserted.