Testing the query [1] on 1.18alpha together with SMW 1.6.2 r96240, SRF 1.6.1
r96240, generates expected results but pressing "Hide query", the result disappear and the Special:Ask "limit" inputbox suddenly contains 20q=[[Type::...]][[Modification date::+]]

[1] {{#ask:[[Type::...]][[Modification date::+]]|?Modification date|format=broadtable|limit=20|headers=show|link=all|offset=0}}

Version: unspecified
Severity: normal