The chlib dusi (bread of life in english) is an old standby once given to children at their first confession/first communion (yes there were orthodox parishes that gave first communion to children at the same time as their first confession..and yes = have a humeral veil from an oca parish that used to have adoration and benediction during lent). the chlib dusi slavonic is written in latinica using the slovak alphabet.
The first editions of Chlib dus~i were compiled by Father Aleksander Duchnovic~, the "national awakener" of the Rusyns, who was a liturgist and canon of the Pres~ov Eparchy in the 1st half of the 19th century[...]
The older editions of Chlib dus~i from Europe are in Slavonic only
theologyincolor.com/hymns/pdf/pisennik_bibliography.pdf - -page 3 and 4
Look also for info on Starokatolicki Kosciol Morawitow. They identified themselves in 1906. Until then they were part of RC church in Poland. However, they patron was and is Our Lady of Perpetual Help and they've also had churches in south east part of Poland and Russia/Ukraine.
Maybe ther's a connection/explanation.