On any chart:
Add indicator "Common/Pattern Recognition/CHANNEL_DOWN - Channel Down pattern"

There are two parameters:
(1) "Start Count of Bars on Sides" = 10
(2) "Pattern Inaccuracy (1%)" = 50

Change the default value 50 in the textbox (2) to anything by overwriting the old value (do not use the stepping buttons at the side). Let it be 70.
Now click into the text box of (1). Do not change its value but try to click again into textbox (2). You can't. You can't even use the tab key to go there. If you change the value in (1) then you can already go to text box (2) again.

The issue seems to be present with most indicators with more than 1 parameter.

(Dukascopy ver. 2.11.4)