Can you please check if CQ is logging anything to the log when you add the jar to the install folder? Also, Which version of CQ are you using?
How to avoid it.
-- Try to avoid deleting bundle from felix console. Use install folder to add or remove bundle.
Nothing is logged and I am on CQ 5.5
the bundle needs to be added at a new location inside the repository, touching an existing bundle in the repository does not do anything. So for example, if /apps/mysite/install contains bundle A in version 1.0, bundle A is uninstalled through the web console, touching that jar in /apps/mysite/install does not get it reinstalled. Adding the jar to /apps/mysite2/install gets it installed. As yogesh suggested avoid deleting bundle from felix console. Use install folder to add or remove bundle.