Copy-and-Paste in WebAccess destroys System.History-Field

i have a workitem 4711 with a couple of comments von different people. for example

Jonathan Butler : "This used to work"

Anton Miller : "I think it's in myfunction.c"

If you take a look on the workitem in WebAcecss you see a Identity Image for the Person, his name and then the Comment

If you mark the Comment it's quite easy to mark the Identity Image too, then you make strg-c and paste it with strg-v in another workitem and save it. it's takes a long time, and then the new item is corrupt. it is not possible to save more text in the field. if you change another field, then you can save the workitem but you lose the text in system.hostoryfield.

we are using TFS 2013 Update 4 und IE 11. if you try to paste this in VS 2013 Ultimate Update 4 it's ok.

here ist the corrupt part:

<div Testvertragsfortschreibung in Prod laufen lassen, danke</div><p><span src="http://webhg-tfsprod.int.alte-leipziger.de:8080/tfs/DefaultCollection/_api/_common/IdentityImage?__v=5"></span></p>

normal part:

<p>Hallo Herr Wagner,</p><p>hier ist nur LVV betroffen. Bitte die Durchführung der&nbsp;Testvertragsfortschreibung genehmigen. Danke.</p>