1. Create this simple table:

CREATE TABLE IF NOT EXISTS testtbl
(
id smallint NOT NULL,
value jsonb,
CONSTRAINT testtbl_pkey PRIMARY KEY (id)
)

2. insert one record: INSERT INTO lvl2db.testtbl (id, value) VALUES (1, '{"a": "b"}');
3. Open table in View/Edit data or in Query Tool put query: select * from testtbl;
4. In data output form select row and click "copy":

5. After this, click "paste":
   

6. Make double click to edit field "value" in pasted row, after which the interface crashes (white screen):

pgadmin4 version 8.14, commit: 9e58717 2024-12-09, desktop version, browser: Chrome 130.0.6723.137, OS: Ubuntu 22.04.5 LTS, Linux-6.8.0-50-lowlatency-x86_64-with-glibc2.35