As mentioned in cswiki Village Pump discussion, the cursor in the Search field on the page Special:Search seems to appear in weird position. I've tried it on different language versions (mainly LTR, but RTL have same issues) and the result is the same.
When I click in any position in the Search field (e. g. to correct the query), the blinking cursor appears some 6 characters to the right of the actual position of the ][ cursor.
The behaviour is confirmed in Google Chrome (both Win7 and Win10), but in Firefox everything seems to be OK. This behaviour doesn't affect the search box in the upper right corner.