# MedCat Trainer stops snapping to next annotation in window, (Very long document)
**URL:** https://discourse.cogstack.org/t/medcat-trainer-stops-snapping-to-next-annotation-in-window-very-long-document/153
**Category:** MedCAT
**Created:** [February 9, 2023, 4:27pm UTC](https://discourse.cogstack.org/t/medcat-trainer-stops-snapping-to-next-annotation-in-window-very-long-document/153 "2023-02-09T16:27:35Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@Samora](https://discourse.cogstack.org/u/Samora)
#### Post date: [February 9, 2023, 4:27pm UTC](https://discourse.cogstack.org/t/medcat-trainer-stops-snapping-to-next-annotation-in-window-very-long-document/153/1 "2023-02-09T16:27:35Z")
v2.5.3
Document no longer moves to annotation location after several annotations down in a long document. This is when pressing right arrow key or the mouse button on the \>\> arrow. The summary annotated text shows the selected annotation changing though the summary information except for the text is empty.
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### Author:  [@tomolopolis](https://discourse.cogstack.org/u/tomolopolis)
#### Post date: [February 13, 2023, 10:39pm UTC](https://discourse.cogstack.org/t/medcat-trainer-stops-snapping-to-next-annotation-in-window-very-long-document/153/2 "2023-02-13T22:39:57Z")
is this still happening in the later 2.5.5 patch release?
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### Author:  [@Samora](https://discourse.cogstack.org/u/Samora)
#### Post date: [February 13, 2023, 11:47pm UTC](https://discourse.cogstack.org/t/medcat-trainer-stops-snapping-to-next-annotation-in-window-very-long-document/153/3 "2023-02-13T23:47:50Z")
update:
Cloning the project and using the remaining documents again starts to have strange behaviour such as concepts no longer being annotated at all upon moving to a new document.
Taking the remaining un-annotated documents, creating a new project and uploading them. Then starting to annotate again appears to remove the problem. Perhaps the problem is related to the number of documents that have been annotated in a project already?
\*This happened again at about 100 documents into the project.
This occurred using the patch released today which I believe is 2.5.5.
