I'm having similar problems with one my sitemaps, using Chrome 74.0.3729.157 and Web Scraper 0.4.1.
I set up this sitemap to scrape a set of elements off a page. After that, it visits the page each element links to and scrapes info. From that psprices.com page it follow the link to playstation.com and scrapes info.
If the psprices.com page has a link to a base game for the item, it visits the base game's page and does the same as above.
I tested it on another profile with Chrome 74.0.3729.157 and Web Scraper 0.3.8 and it works as intended. With Web Scraper 0.4.1 I'm getting less info -- it's not going to the non-base-games' playstation.com page.
Here's the sitemap (with a bunch of selectors removed to hopefully make it simpler to troubleshoot):
{"_id":"z_psprices_test","startUrl":["https://psprices.com/region-us/discounts/?platform=PS4&page=1"],"selectors":[{"id":"itemLink","type":"SelectorLink","parentSelectors":["itemElement"],"selector":"a.content__game_card__cover","multiple":false,"delay":0},{"id":"psnLink","type":"SelectorLink","parentSelectors":["itemLink"],"selector":"div.col-md-9 a.content__game__btn","multiple":false,"delay":0},{"id":"releaseDate","type":"SelectorText","parentSelectors":["itemLink"],"selector":"div#price_history > div:nth-of-type(2)","multiple":false,"regex":"","delay":0},{"id":"baseGame","type":"SelectorLink","parentSelectors":["itemLink"],"selector":"div.content__game__title__parent a","multiple":false,"delay":0},{"id":"baseGameLink","type":"SelectorLink","parentSelectors":["baseGame"],"selector":"div.col-md-9 a.content__game__btn","multiple":false,"delay":0},{"id":"baseGameReleaseDate","type":"SelectorText","parentSelectors":["baseGame"],"selector":"div#price_history > div:nth-of-type(2)","multiple":false,"regex":"","delay":0},{"id":"psnRelease","type":"SelectorText","parentSelectors":["psnLink","baseGameLink"],"selector":"span.provider-info__list-item:nth-of-type(2)","multiple":false,"regex":"","delay":0},{"id":"itemElement","type":"SelectorElement","parentSelectors":["_root"],"selector":"div.col-md-2:nth-of-type(n+7)","multiple":true,"delay":0}]}